Bridge clean up for sky high Pam the Bird graffiti

Crews have begun a clean up operation to remove Pam the Bird graffiti on Melbourne's Bolte Bridge. (Christopher Hopkins/AAP PHOTOS)

Work is underway to remove a massive Pam the Bird graffiti tag painted on a major bridge.

Painters turned up at Melbourne's Bolte Bridge on Thursday morning as they began the sky-high job of abseiling down the pylon to cover up the vandalism.